Here are three web-based comic strip makers:
has cool black and white graphics
is very cartoony
lets you use your own photos
All three are free, though you need to register. You don’t have to draw anything, just click and drag! StripGenerator and ToonDoo let you choose from their graphics to tell your story. Comeeko lets you use photos from your digital camera.
This is a fun way to practice writing in English, and you can share your completed comic strips with your friends. Here’s a quick one I made at StripGenerator! You can post them in your blog, too. (Warning: Some of the other users’ comics are crude or stupid.)
Here’s a silly one I made just now at Comeeko, which has lots of special effects and other things you can add: